source

The source element identifies a
resource from which the present topic is derived, either completely
or in part.

The source element contains a description of the resource.
Alternatively, the href or keyref attributes can be used to reference a description of the resource. It is
implementation-dependent what it means when the element has both content and an
attribute-based reference to another resource.

This element is equivalent to the Source element
in Dublin Core.

Content models

See appendix for information about this element in OASIS document type shells.